How do you test a power supply circuit board?
Place your meter probe on the circuit directly after the first resistor. Set your volt meter to the “resistance” setting. Power the board and make a note of the reading. The meter will signal a zero reading if the resistor has shorted or is not connected.
How do I check my power supply voltage?
Switch your multimeter to the range that is appropriate for reading the voltage from your power supply. If your power supply’s voltage is 125 volts, switch your multimeter to read a range of 100-200 volts. Some multimeters may not offer a range, so you may need to choose the approximate voltage on a dial.
How do you know if your TV fuse is blown?
Remove the fuse from its holder. In some cases you may need a small screwdriver to unscrew the fuse holder cap. Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.
How can you tell if a circuit board is bad?
Examine the circuit board and search for signs such as crushed components, bulges, damaged wires, cracks, misplaced or extra solder, burn marks and scratches that indicate that the board is either bad or requires replacement and professional assistance.
How does the LCD power supply tester work?
The LCD Power Supply Tester will beep continuously when it detects a power defect within the current circuit. Power defects that the power supply tester will alert you to include a missing voltage, over-voltage or under-voltage on power rails. Please refer to the User Manual for nominal rail voltages and voltage fluctuation information.
What kind of power supply does an LCD TV use?
Typical LCD TV PSU (Power Supply Unit) LCD TVs Use a switching type power supply also known as an SMPS or Switch Mode Power Supply. The power supply converts the mains AC supply into DC (Direct Current) voltages that can be used by the circuits within the LCD TV.
Where can I find the passmark LCD power supply tester?
The URL for the LCD Power Supply Tester (PS-228) User Manual was provided as part of your hardware shipment from PassMark. If you purchased the PC Test Kit, it will also be available in the Documents and Guides folder on the PassMark UFD.
Can a power supply tester be used for a PSU?
It should only take a few seconds to effectively test a PSU for faults using the Power Supply Tester. In no circumstance should power connectors be tested for more than fifteen seconds. At the very least, continuous testing may overheat and damage your LCD Power Supply Tester. Why aren’t the green LEDs lighting up?